The first few miles of the cataract were negotiated in safety in the early morning, and Mr. Sheldon had just finished making a sketch of the rapids when sudden and dire disaster overtook the party. The boat was a stoutly built, three-quarter-decked craft, with one huge wing-like sail, and the pilot had given the sheet into the care of the camel-man, who, to save himself trouble, tied it, unobserved, to one of the seats. Finding it necessary to tack across the river, to take the boat through a safe channel between the rocks, the pilot, to bring the sail over, shouted to the man to let go the rope. As it was securely fastened to the seat, however, he was unable to do so, and in an instant, as the strong wind caught the tacking boat, it capsized, flinging its occupants with startling suddenness into the water. Mr. Sheldon sank, but, after what seemed to him an interminable time, rose to the surface, and, dashing the water from his eyes, found himself battling with the full force of the seething current, which threatened every instant to hurl him against the rocks. He realized immediately that he would have a hard fight for his life, and at once struck out for the boat, which was floating on her side some distance off. The only other alternative was to swim to the nearest shore, but, as that was a quarter of a mile or more away, Mr. Sheldon knew that he would be unable to reach it alive in such a terrific current. After a desperate struggle he gained the boat and pulled himself up astride the gunwale. Mr. Seppings Wright had also managed to reach the boat, which, under their combined weight, was floating but six inches out of the water; while the pilot and camel-man hung on to the mast and spar--all of them looking, as Mr. Sheldon says, more like half-drowned rats than anything else he can think of. It was quite evident that their position was critical, their one hope being to cling to the boat, which was being carried down the Nile at an alarming rate. At any moment it might go to pieces among the great masses of rock and huge basalt boulders which projected from the surface of the river throughout the entire length of the cataract. Indeed, their chances of ever setting foot again on dry land appeared to be well-nigh hopeless. It was only with extreme difficulty that they managed to cling to the little craft as it plunged and kicked in the swirling eddies of the cataract, and, once at the mercy of the furious torrent, they knew full well that nothing short of a miracle could save them.